 
(* ::Section:: *)
(* CSIS *)
(* ::Text:: *)
(*CSIS[p]can be used as input for 3-dimensional $\sigma ^ip^i$ with 3-dimensional Cartesian vector p and is transformed into PauliSigma[CartesianMomentum[p]] by FeynCalcInternal..*)


(* ::Subsection:: *)
(* See also *)
(* ::Text:: *)
(*PauliSigma.*)



(* ::Subsection:: *)
(* Examples *)



CSIS[p]

CSIS[p]//FCI//StandardForm

CSIS[p,q,r,s]

CSIS[p,q,r,s]//StandardForm
